How to have a sign in screen for users, without the 403 Access Denied messages?  I would like to conditionally use a certain theme for sign in, and without the 403 Access Denied messages.  Is this possible out  of the box?

Accepted answer

There is a module for that:

https://backdropcms.org/project/r4032login

You can use a custom theme for that page. If you also want a specific layout, then create a layout override that uses that path (e.g. /user/login) and then using Layout Custom Theme (Disclosure: I created and maintain that module) select the theme you want to use for that layout.

Comments

There is a module for that:

https://backdropcms.org/project/r4032login

You can use a custom theme for that page. If you also want a specific layout, then create a layout override that uses that path (e.g. /user/login) and then using Layout Custom Theme (Disclosure: I created and maintain that module) select the theme you want to use for that layout.

Thanks for the quick answers!